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From: Alexey Tourbin <at@altlinux.ru>
To: ALT Devel discussion list <devel@altlinux.ru>
Subject: [devel] Re: Fwd: [AMaViS-user] Perl on Linux bug when reading and the last line does not terminate by a newline
Date: Sun, 15 May 2005 22:42:43 +0400
Message-ID: <20050515184242.GO3554@solemn.turbinal.org> (raw)
In-Reply-To: <b966c1e40505151021633e1cc8@mail.gmail.com>

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On Sun, May 15, 2005 at 09:21:25PM +0400, Alexey Shabalin wrote:
> День добрый. 
> У нас вроде тоже самое.
> Чем это может грозить?

Это гонево какое-то.

> >  http://marc.theaimsgroup.com/?l=amavis-user&m=111458535106056

$ echo -n 'xxxx' | perl -e 'undef $!; while(<>){last if $_ eq "\n"}; $!==0 or die $!'
Bad file descriptor at -e line 1, <> line 1.
$

Это вовсе не ошибка.  $! -- это errno, его нельзя в произвольном месте
программы проверять, а *только* сразу после вызова функции, которая
вернула "плохой статус" (undef) и которая в этом случае документированно
устанавливает errno.  Т.е.
	
	# правильное использование errno:
	open(...) or die $!;

	# редиски:
	{ ... }
	$!==0 or die $!;

Посмотрите в errno(3), там то же самое написано.

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      reply	other threads:[~2005-05-15 18:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-05-15 17:21 ` [devel] " Alexey Shabalin
2005-05-15 18:42   ` Alexey Tourbin [this message]

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